01 - Preheat oven to 400°F. Lightly grease a baking dish or line it with parchment paper.
02 - Pat the chicken thighs dry thoroughly with paper towels. Season both sides generously with salt and freshly ground black pepper.
03 - In a mixing bowl, combine the panko breadcrumbs, grated Parmesan, chopped parsley, rosemary, thyme, minced garlic, olive oil, salt, and black pepper. Toss until evenly incorporated.
04 - Press the herb-breadcrumb mixture firmly onto the skin side of each chicken thigh, building an even, packed crust layer.
05 - Place the coated chicken thighs in the prepared baking dish, skin side facing up, leaving space between each piece for even air circulation.
06 - Bake for 30 to 35 minutes until the herb crust turns a deep golden brown and the internal temperature of the thickest part reaches 165°F. Remove from the oven and set aside.
07 - While the chicken bakes, melt the butter in a saucepan over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant, stirring constantly to prevent browning.
08 - Pour in the chicken broth and bring to a gentle simmer, cooking until the liquid reduces by roughly half. Stir in the heavy cream, Dijon mustard, and Parmesan cheese. Simmer for 3 to 4 minutes, stirring occasionally, until the sauce thickens enough to coat the back of a spoon. Season with salt and pepper to taste.
09 - Transfer the baked chicken thighs to a serving platter. Spoon the creamy garlic sauce over and around the chicken. Finish with a scattering of fresh chopped herbs and lemon wedges on the side.